MagicalRecord findByAttribute returning inverse relationship documents issue

I'm having an issue figuring out how to model/fetch items with Core Data and MagicalRecord. I have two entities, User and Message, which both have inverse relationships to each other:

User Entity

Relationship    Destination    Inverse    Type
-------------------------------------------------
messages        Message        user       To Many

Message Entity

Relationship    Destination    Inverse    Type
-------------------------------------------------
user            User           messages   To One

Issue

When fetching messages by a given user, MagicalRecord is returning 2x the number of records since it's matching attributes at the user and user.messages.user keyPaths:

- (NSArray *)fetchMessagesByUser:(NSString *)identifier {

    // returning 2x the records it should
    return [Message MR_findByAttribute:@"user.identifier" withValue:identifier];
}

Should I change the way I'm using MagicalRecord or is there a fundamental issue with my Core Data model?